Grab, a program that comes pre-installed all Macs, lets you create screenshots directly from the menubar. You’ll find this program in the Utilities folder, which is housed within the Applications folder.
Once you launch Grab, you’ll see an icon for the program in your dock. If you want, you can also pin this icon for quick access later.
Grab doesn’t usually have a window when open, and instead, runs almost entirely from the menubar